Effects of shading at flowering and grain filling stages on osmotic regulation substance contents and activities of protective enzymes in leaves of different hybrid rice combinations were investigated by using Ⅱyou 498, Gangyou 188, Dexiang 4103, Gangyou 527 and Chuanxiang 9838 as test materials. The results showed that the content of malondialdehyde of Gangyou 188 was significantly increased under shading, whereas the content of malondialdehyde of Ⅱyou 498, Dexiang 4103, Gangyou 527 and Chuanxiang 9838 had insignificant difference compared to the control. The content of soluble sugar was significantly decreased in Ⅱyou 498, Gangyou 188, Dexiang 4103 and Chuanxiang 9838 under shading. However, the content of souble sugar was not significantly increased in Gangyou 527 under shading. The content of soluble protein in the leaves of different hybrid rice combinations tended to decrease under shading. The activities of protective enzymes in leaves varied among different hybrid rice combinations under shading. Taking both the contents of osmotic regulation substances and the activities of protective enzymes in rice leaves into consideration, Gangyou 188 and Gangyou 527 had strong ability to adapt themselves to weak light conditions. The damage mechanism of leaves of different hybrid rice combinations under shading was discussed.
LIU Li1 , WANG Li1 , DENG Fei1 , HUANG Yun1 , LIU Daiyin2 , REN Wanjun1,* , YANG Wenyu1
. Osmotic Regulation Substance Contents and Activities of Protective Enzymes in Leaves of Different Hybrid Rice Combinations as Affected by Shading[J]. Chinese Journal OF Rice Science, 2012
, 26(5)
: 569
-575
.
DOI: 10.3969/j.issn.10017216.2012.05.009
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